“A light wind swept over the corn, and all nature laughed in the sunshine.”        – Anne Bronte

Good afternoon!

Today we began looking at both reflections and rotations, two new transformations for us. When a shape is reflected in a mirror, we are actually seeing what is known as the reflection image. A reflection is sometimes called a flip because when a shape is reflected, it is flipped over. Flipped over what? The line of reflection of course. There are great tricks that students can use to help the accurately reflect or flip a shape:

  • If you draw a line between a vertex on the shape to it’s matching vertex on the reflection image, it will be perpendicular to the line of reflection.
  • A point and its image are the same distance from the line of reflection.
  • A shape and its reflection image have opposite orientations (they are facing opposite ways)

Check out the example below:

Math - June 12-1

Students practiced using graphing paper to help them to make accurate reflections. They were also allowed the use of a mira. A mira is a tool that allows students to see the reflection image. It is a great way to check your work or for flipping an object across the line of reflection if you are struggling.

Rotations (or turns) are a little more complicated. When a shape turns about a point, it is rotated from one position to another. The shape in its new position is called the rotation image of the shape. I like to think of rotating as being similar to the hands on a clock. Check out the example below:

Math - June 12-2

 

I always encourage students to draw the vertical and horizontal lines (an addition sign or a t) through the reflection point. I find that this makes it easier for students to be able to visualize what a quarter turn, a half turn, or a three-quarter turn would actually look like. Students were also allowed to use tracing paper to help them to turn their objects.

In Social Studies today, we learned a basic jig step and then we tried to dance a Red River Jig. It is very difficult! Want to practice your jig step at home? Follow the link below:

https://www.youtube.com/watch?v=NqDW7S73-Zg

Agenda:

Read 20 minutes

Reading Journals – tomorrow!

Math: pgs. 304-305 #1-6, pgs. 308-309 #1-5

Science: Chemistry tests signed (ASAP)

Jive on Brett Drive – Thursday @ 6:00 pm

Gr. 3 Art Sale (for Project Cambodia) – Wednesday